The largest de Broglie wavelength among the following (all have equal velocity) is: 

1.  CO2 molecule

2.  NH3 molecule

3.  Electron

4.  Proton

Subtopic:  De Broglie Equation |
 78%
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 Von two particles A and B are plotted against de-Broglie wavelengths. Where V is the potential on the particles. Which of the following relation is correct about the mass of particles?

                             

1.  mA=mB

2.  mA>mB

3.  mA<mB

4.  mAmB

Subtopic:  De Broglie Equation |
 61%
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The graphs that represents the variation of momentum of particle with de-Broglie wavelength is: 

1. 2.
3. 4.

Subtopic:  De Broglie Equation |
 67%
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The excited state of an H atom emits a photon of wavelength λ and returns to the ground state. The principal quantum number of the excited state is given by:

1.  λRλR-1

2.  λRλR-1

3.  λRλR+1

4.  λR-1λR

Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 67%
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A dye absorbs a photon of wavelength λ and re-emits the same energy into two photons of wavelengths λ1  and λ2 respectively. The wavelength λ is related to λ1 and λ2 as-

1.  λ=λ1+λ2λ1λ2

2.  λ=λ1λ2λ1+λ2

3.  λ=λ12+λ22λ1+λ2

4.  λ=λ1λ2λ1+λ22

Subtopic:  Bohr's Theory |
 83%
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STATEMENT-1: Line emission spectra are useful in the study of electronic structure.

STATEMENT-2: Each element has a unique line emission spectrum.

1. If both the statement are true and statement -2 is the correct explanation of statement 1

2. If both the statements are true but statement-2 is not the correct explanation of statement 1

3. If statement 1 is true and statement 2 is false

4. If statement 1 is false and statement 2 is true

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Type of Spectra |
 74%
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Statement-1: Emitted radiation will fall in visible range when an electron jump from n=4 to n=2 in H-atom

Statement-2: Balmer series radiations belong to the visible range for hydrogen atoms only.

1.  If both the statement are true and statement -2 is the correct explanation of statement-1

2.  If both the statements are true but statement-2 is not the correct explanation of statement-1

3.  If statement-1 is true and statement-2 is false

4.  If statement-1 is false and statement-2 is true

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Hydrogen Spectra |
 63%
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Statement 1: The ground state electronic configuration of nitrogen is

                                

Statement 2: Electrons are filled in orbitals as per the Aufbau principle, Hund's rule of maximum spin multiplicity, and Pauli's principle.

1.  If both the statement are true and statement -2 is the correct explanation of statement-1

2.  If both the statements are true but statement-2 is not the correct explanation of statement-1

3.  If statement-1 is true and statement-2 is false

4.  If statement-1 is false and statement-2 is true

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Pauli's Exclusion Principle & Hund's Rule | AUFBAU Principle |
 84%
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Each questions contains STATEMENT-1 (Assertion) and STATEMENT2- (Reason).

Examine the statements carefully and mark the correct answer according to the instructions given below:

Statement-1: Orbital having xz plane as node may be 3dxy.

Statement-2: 3dxy has zero radial node.

1.  If both the statement are true and statement -2 is the correct explanation of statement-1

2.  If both the statements are true but statement-2 is not the correct explanation of statement-1

3.  If statement-1 is true and statement-2 is false

4.  If statement-1 is false and statement-2 is true

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Nodal Plane |
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The quantum number not obtained from Schrodinger’s wave equation is:

1. \(n\) 2. \(l\)
3. \(m\) 4. \(s\)
Subtopic:  Quantum Numbers & Schrodinger Wave Equation |
 83%
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